• Echo Dot@feddit.uk
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      2 hours ago

      Large boulder is a state of mind. It achieved an awful lot that day and was feeling especially pleased with itself thus the honorific.

  • mnemonicmonkeys@sh.itjust.works
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    16 hours ago

    Complaining about Kressler Syndrome

    Complaining about Starlink

    Pick one, asshole. As shitty as Musk is, Starlink is in too low of an orbit to cause Kressler Syndrome

    • Echo Dot@feddit.uk
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      2 hours ago

      Every time somebody mentions Kessler syndrome they always seem to forget that low earth orbit is an area literally bigger than the earth’s surface. There’s about 10,000 of them and they are spread out over an area bigger than the surface of the earth. Meanwhile there are way more than 10,000 trucks in the world and apparently they are twice the size, and yet there are huge swaths of land that do not currently have a truck on them. I think we’ll be okay.

      Although I do accept they are probably irritating for astronomers.

    • bluGill@fedia.io
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      6 hours ago

      The only worry about low earth orbit is something survives reentry enough to become a bomb. these are enough to destroy a house if that happens - my undertanding is this can’t happen but if they did

      • mnemonicmonkeys@sh.itjust.works
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        2 hours ago

        Starlink satellites aren’t large enough to survive the heat of reentry. A more likely concern is the various materials vaporizing and dispersing into the atmosphere, as was mentioned in the article.

        That being said, calling them “heavy metals” like the interviewee did is rather dubious. We’re not talking about lead, as what most readers imagine when they hear that term. It’s mainly aluminum and copper. The person interviewed is picking their words to overexaggerate their claims

      • Echo Dot@feddit.uk
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        2 hours ago

        Well if the atmosphere decides it’s going to have a day off then I’ll start to worry.

        The temperatures generated by reentry are not just hot enough to vaporize a satellite they are way beyond hot enough to vaporize a satellite. I can’t imagine any scenario where a satellite survives. In any case the vast majority of the orbits are controlled, Which means they come down over the ocean.

  • RamRabbit@lemmy.world
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    19 hours ago

    Yep, they are in Low Earth Orbit. A place that has a very, very small amount of air, so the satellites experience drag, lose speed, eventually the propellant tanks run dry, and they burn up in the atmosphere. The ISS experiences the same thing, which is why its altitude slowly falls, then you see a sharp increase as they push to a slightly higher orbit.

    At the altitude the SpaceX satellites are at, they only passively stay up for a few years. With the onboard propulsion giving them each another few years.

    • SreudianFlip@sh.itjust.works
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      17 hours ago

      One fell in a farmer’s field in Saskatchewan. Dude got a hassle, some publicity, and a nominal fee of a grand or something.

      • Echo Dot@feddit.uk
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        2 hours ago

        I don’t remember that happening. I would actually be surprised if a satellite would survive reentry with basically anything left of it. If you want to return something from orbit you need heat shield or you’re not getting it back.

        Even the ISS is expected to completely burn up and that’s much higher mass than a starlink satellite

      • BarneyPiccolo@lemmy.today
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        5 hours ago

        A grand? Then I’m keeping it. I can make more as a roadside tourist attraction. Or maybe I sell it to the Chinese or Bezos or something. You want your toy back, Musk? Pay up, you cheap bastard!

      • Iconoclast@feddit.uk
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        12 hours ago

        It wasn’t from a starlink satellite though.

        which the U.S. aerospace company SpaceX later admitted was part of a cargo trunk for its Crew Dragon spacecraft.

        Source

  • halcyoncmdr@piefed.social
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    16 hours ago

    Yeah that’s what happens to absolutely everything in Low Earth Orbit in just a few years. Well, unless you keep pushing them back up like we do to the International Space Station.

    These satellites are doing exactly what they’re intended to do. These are actually pretty small satellites overall, there are a lot up there quite a bit larger that deorbit and burn up on re-entry just fine as well.

    That’s part of the reason things are sent to LEO specifically, because their orbits naturally degrade and they naturally deorbit themselves without needing any assistance or fuel. It also means if a satellite in LEO fails quicker than planned, is put in an incorrect orbit due to a launch issue, or just failed prematurely, it will fail-safe and deorbit without any assistance.

  • Em Adespoton@lemmy.ca
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    18 hours ago

    Half the size of a pickup truck… a Mazda compact, or a jacked up GMC Hemi half ton?

    Even just saying Ford F150 gives a lot of leeway.

    • Echo Dot@feddit.uk
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      2 hours ago

      They’re about the size of a large flat screen TV. I have no idea why they reached the pickup trucks, they might have the width but they’re only a couple of inches thick. A flat screen is a much better analogy.